Fig. 7

Cell attachment of MC3T3-E1 cells on the scaffolds at 6 h (a) and cell proliferation of MC3T3-E1 cells on the scaffolds (b). Modified OD values are ODs measured at 450 nm subtracted by ODs measured at 620 nm. The modified OD values at days 4 and 7 were normalized to those at day 1. * denotes p < 0.05 compared with the P group, and # denotes p < 0.05 compared with the PM-L group